A storm will make for a wet Tuesday in the Bay Area, starting with the morning commute, and more rainfall is expected on the weekend.

National Weather Service forecaster Bob Benjamin said periods of rain could begin about dawn Tuesday and continue on and off overnight, with sporadic showers into Wednesday.

He added that the storm won't do much to fill regional reservoirs.
"We do have rain on the way, but it won't be the answer to our prayers," Benjamin said, predicting a half-inch or so.

He said the Gulf of Alaska system will bring somewhat cooler weather, with lows in the mid 40s, highs in the low 60s. It may be breezy on Wednesday, and thunder may develop as atmospheric systems collide.

Another weather system is picking up steam on the horizon and will sweep into the region Saturday, providing a wet weekend - and perhaps a bit more rain than the storm on Tuesday.